ZSM-22-ZSM-23复合分子筛催化剂调节正十二烷临氢异构化产物分布OA
The ZSM-22-ZSM-23 composite molecular sieve catalyst regulates the product distribution of the hydroisomerization of n-dodecane
本研究通过机械混合的方法,制备出了ZSM-22-ZSM-23复合分子筛.采用XRD、SEM、TEM、NH3-TPD、Py-FTIR及N2吸附-脱附等方法对样品的形貌、酸性质、织构性质等进行表征,并以正十二烷为模型反应物,对比研究了其与两种单一分子筛的临氢异构催化性能.通过改变ZSM-22和ZSM-23分子筛的质量比,可以有效调节分子筛的部分织构性质和酸性质;当ZSM-22与ZSM-23质量比为4∶1时,异构十二烷的选择性较ZSM-23提高了24％,端位支链与中间位支链产物选择性之比(st/si)较ZSM-22降低了14％.结果表明,该复合分子筛结合了两种单一分子筛在织构与酸性质方面的优势,表现出更优异的临氢异构化性能,可有效调节异构十二烷中端位与中间位异构体的分布.
In this study,ZSM-22-ZSM-23 composite zeolite was synthesized via a mechanical mixing method.The morphology,acidic properties,and textural properties of the samples were characterized by XRD,SEM,TEM,NH3-TPD,Py-FTIR,and N2 adsorption-desorption techniques.The hydroisomerization catalytic performance of the composite zeolite was evaluated using n-dodecane as a model reactant,and compared against the individual zeolite components.It was found that the textural and acidic properties could be precisely modulated by varying the ZSM-22 to ZSM-23 mass ratio.At an optimal mass ratio of 4∶1,the selectivity for iso-dodecane increased by 24％relative to ZSM-23,while the ratio of terminal-branching to intermediate-branching product selectivity(st/si)decreased by 14％compared to ZSM-22.The results demonstrate that the composite zeolite combines the advantages of both individual zeolite in terms of texture and acidity,exhibits superior hydroisomerization performance,and can effectively regulate the distribution of terminal-branching and intermediate-branching isomers in iso-dodecane.
鲁海莹;侯建乐;李瑞丰;郭雨萌;金文瑞;段雨杰;向江南;张巍;王琰;盖立敏;王小伟
太原理工大学化学与化工学院,山西太原 030024山西新鸿顺能源有限公司,山西吕梁 032100太原理工大学化学与化工学院,山西太原 030024太原理工大学化学与化工学院,山西太原 030024太原理工大学化学与化工学院,山西太原 030024太原理工大学化学与化工学院,山西太原 030024太原理工大学化学与化工学院,山西太原 030024太原理工大学化学与化工学院,山西太原 030024太原理工大学化学与化工学院,山西太原 030024||山西新鸿顺能源有限公司,山西吕梁 032100山西省高质量转型发展研究院转型发展研究室,山西太原 030013山西新鸿顺能源有限公司,山西吕梁 032100
能源科技
ZSM-22ZSM-23复合分子筛临氢异构化正十二烷
ZSM-22ZSM-23composite molecular sieveshydrogenation isomerizationn-dodecane
《燃料化学学报（中英文）》 2026 (9)
54-63,10
Supported by the Basic Research Plan of Shanxi Province-Natural Science Research Surface Project(202203021221055),National Natural Science Foundation of China(22378286),the Central Government Guides Local Science and Technology Development Funds(YDZJSX2021A014),the National Natural Science Foundation of China Youth Science Fund Project(22302143),Shanxi Natural Science Foundation Youth Scientific Research Project(202303021212067),Construction Plan for the Lüliang City Technology Innovation Center(2025CXZX04).
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